Electric belt.



No. s3s,|4a. Patented Nov. 28, I899. A. T. smmzn.

ELECTRIC BELT.

(Application filed Feb. 18, 1899.)

(No llodol.)

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UNITED STATES PATENT OFFICE.

ALBERT T. SANDEN,

OF NEW YORK, N. Y.

ELECTRIC BELT.

SPECIFICATION forming part of Letters Patent No. 638,148, dated November28, 1899.

Application filed February 18, 1899. Serial No. 705,981- (No model.)

To aZZ whom it may concern:

Be it known that I, ALBERT T. SANDEN, a citizen of the United States ofAmerica, and a resident of NewYork city, county and State of New York,have invented certain new and useful Improvements in Electric Belts, ofwhich the following is a specification.

The essential feature of improvement in electric belts herein claimed isa construction of the bearing-pads for simple and convenient detachableapplication of a sponge-insulating bearing-surface to be charged withwater intermediate of the metallic disk and the body of the wearer,whereby the electric current is diffused and made to act over a largersurface of the body than when the metallic pad has direct contact, inwhich case the current concentrates at the point where there is thegreatest pressure of the pad and sometimes burns, blisters, and producesother ill effects of too much heat.

Another feature of the improvement comprises a novel and more efficientconstruction of the hooks for connecting and disconnecting the chain ofcells to the belt, all as hereinafter described, reference being made tothe accompanying drawings, in which- Figure 1 is a perspective view ofan electric belt comprising my improvements. Fig. 2 is a section of oneof my improved pads on line 2 2 of Fig. 1. Fig. 3 is a plan View of oneof the cells and my improved attachinghook, and Fig. 4; is a top view ofthe apparatus of Fig. 3.

In the drawings, 0. represents the pad for the contact with the body ofthe wearer at the front, and b, the pads for the back.

0 represents the battery-cells, d the inside portion, and e the outsideportion, of the tubular belt employed to carry the cells and the pads,the cells being coupled in series by the conducting-Wires f and 9, saidseries being at one end coupled to the part at of the belt at h and atthe other end coupled to the elastic strap '5 at j.

In my improved construction of the pad I provide a concavo-convex diskof metal, preferably aluminium, and a smaller disk m,

. the former disk having a central stud-bolt and nut n on the concaveside and the latter disk having a central hole to be clamped on by saidbolt and nut.

For the application of the sponge I cut it in the form of a disk ofconsiderably-larger diameter than the disk 70 and fold the margin overthe edge and onto the back of the disk, as at Z, and clamp the foldedmargin by the disk m and the stud-bolt and nut n, and I attach ametallic loop 0 to the disk n for stringing the pad on the strap 11 orp. The conducting-wire a may connect with the disk through the stud-bolt'n or by any other approved means.

The chain of cells has to be detached frequently from the belt to beimmersed in vinegar for generating the currents, for which it isdesirable to employ some means of fastening that will not disconnect bythe effects of the motions of the body of the wearer in use and thatwill not be injuriously affected by the corrosive action of the vinegar.In the common construction the ordinary snaphook is used; but it isunsatisfactory because the acid of the vinegar soon destroys the life ofthe spring and it fails to keep the connection. I have thereforeprovided the rigid unyielding hook s, with the broad or diskshaped pointt bored for the screw it, with a tapped hole for the screw in the shanky of the hook, so that the yoke w or other attachment of the terminalcell may be secured in the hook by the screw, as clearly shown in hookin use. The hook connecting the end of the chain of cells from which thecurrent flows to the pads b is formed with a shank 3 which is riveted tothe part (1 of the belt near the end to which the elastic strap '5 isconnected and has a resistance device 2 attached, through which thecurrent passes to the wire a, connecting the pads Z), and in which theresistance may be varied by turning the screw I) up or down to vary thecurrent, as may be desired.

While I have shown and described sponge for the disk-cover of the pad,it is obvious that felt of loose texture or other similar fabric willserve as well, and I include such fabrics as well in my claims.

What I claim as my invention is- 1. The combination in a pad forelectric belts, of the concavo-convex disk 70, having the stud-bolt andnut 'n in the center of the concave side, the clamping-disk m, and theFigs. 3 and 4, in a manner not liable to un- 10 perforated disk-shapedpoint, and the screwthreaded perforation of the shank coincident withsaid perforation, of the point and a screw adapted to said perforationsfor securing the yoke in the hook.

' Signed by me at New York, N. Y., this 8th 15 day of February, 1899. V

ALBERT T. SANDEN. lVitnesses:

Anson P. THAYER, O. SEDGWICK.

